You do have a point, I might aswell be overexaggerating a bit because I really enjoy playing Zoe;d
+ There are many champions that don't have a lot of skins though there is also many who have just a lot or even too much.
Also Kai'sa has more skins than Zoe even tho she came out 10 months ago.
Anyway at the end of the day you won't change my opinion on this topic ;pp
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I do fully agree that quite a bit if not lot of champions are in need of a skin and you showed quite a handful of champions who should get a skin!
Yet as @The7thSeal said, these are champions which require more time to create a new *GOOD* skin idea, thought some have already quite a bit of skins ^^
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You'll get 150 as bonus with pass purchase, you missed some free missions, so let's you'll get another 350 tokens from them, then 25 more days of event will give you 500 tokens from daily missions. That's more than half of needed amount, so you just need 800 more. 10 per win on SR or 5 for defeat. 6/3 if you're more of ARAM/NB fan. with 50% winrate we can just take average 7.5 per SR game or 4.5 for ARAM/NB. 800/7.5 = 107 SR games, so 4-5 SR games daily. OR 800/4.5 = 180 or 7-8 ARAM/NB games daily. Seems doable if you won't miss any more dailies . By playing more and winning more than 50% you can get it even faster.